Health tracking is moving beyond counting steps or checking a single heart-rate reading.
The more useful question now is what happens to a person’s health measurements over weeks, months or even years. A single reading can be interesting, but a consistent record can reveal changes that are much harder to see otherwise.
This is where mobile apps, smartwatches, rings, continuous glucose monitors and connected biosensors are becoming important. Towards Healthcare identifies Apple Health, Fitbit, Garmin Connect, Samsung Health, Withings Health Mate, Oura and WHOOP among the leading digital health tracking platforms.
The digital health tracking app market size is calculated at US$ 16.11 billion in 2024, grew to US$ 18.68 billion in 2025, and is projected to reach around US$ 67.97 billion by 2034. The market is expanding at a CAGR of 15.94% between 2025 and 2034.
Apple Watch and Apple Health: Strong for Broad Tracking
Apple is probably one of the strongest choices when the goal is to bring several health signals into one long-term record.
Apple Health can collect information from Apple Watch and other connected devices, including heart rate, ECG, sleep, activity and blood oxygen data, depending on the device and region.
Towards Healthcare lists Apple among the leading digital health monitoring companies and notes that Apple Watch has expanded from fitness tracking toward broader health monitoring.
The real advantage is not necessarily one individual measurement.
It is the ability to build a longer personal record and observe whether activity, resting heart rate, sleep or other measures are changing together.
Oura: Particularly Interesting for Longitudinal Trends
For people interested in continuous tracking rather than a traditional smartwatch experience, Oura Ring is particularly interesting.
The ring tracks signals such as heart rate, blood oxygen, body temperature, sleep and activity, creating a picture of how the body changes from day to day.
Towards Healthcare reports that Oura had sold more than 2.5 million units since its launch in 2015 and raised $200 million, reaching a reported valuation of $5.2 billion.
The company is also moving toward combining different biological signals. In November 2024, Oura partnered with Dexcom to connect glucose data with Oura’s sleep, heart-rate and activity information.
That combination is particularly interesting because glucose, sleep and activity can tell a more complete story when viewed together.
Dexcom: When the Biomarker Is Glucose
If the focus is specifically on a measurable biomarker rather than general wellness, Dexcom is one of the strongest examples.
Its continuous glucose monitoring systems, including Dexcom G7, provide repeated glucose readings throughout the day and connect those measurements with smartphones and digital platforms.
Towards Healthcare describes Dexcom as a pioneer in CGM technology and highlights its CLARITY analytics platform for healthcare professionals.
This is a different level of longitudinal monitoring because glucose is being measured continuously rather than estimated from occasional manual tests.
Fitbit and Garmin: Useful for Everyday Patterns
Fitbit, now part of Google, remains important for long-term tracking of activity, heart rate, sleep and other health metrics.
Garmin Connect takes a similar approach, combining wearable measurements with longer-term fitness and recovery information.
Towards Healthcare lists both companies among leading digital health tracking platforms, while Garmin’s portfolio includes features such as Body Battery, heart-rate tracking and sleep monitoring.
These platforms are particularly useful for people who want to understand how everyday behaviors affect their longer-term health patterns.
A Simple Comparison
| Company / platform | Main device or app | Longitudinal signals | Best suited for |
|---|---|---|---|
| Apple Health | Apple Watch + app | Heart, sleep, activity, ECG and other available metrics | Broad health tracking |
| Oura | Smart Ring + app | Sleep, HR, SpO₂, temperature, activity | Recovery and daily trends |
| Dexcom | CGM + mobile app | Continuous glucose | Glucose-focused monitoring |
| Fitbit / Google | Wearables + app | Activity, HR, sleep, health metrics | Everyday wellness |
| Garmin | Smartwatches + Connect | HR, sleep, activity, training | Fitness and long-term performance |
| Withings | Watches, scales and connected devices | Weight, HR, activity and other measures | Connected home health |
Capabilities vary by device, model, geography and software version.
The Real Value Is the Timeline
For healthcare researchers, the biggest opportunity is not simply collecting more data.
It is understanding how measurements move together over time.
Towards Healthcare recently highlighted the importance of longitudinal data in health monitoring, noting that extended, repeated measurements can reveal patterns and night-to-night variation that a single intensive measurement may miss.
This is particularly relevant to chronic conditions, clinical research and preventive health.
Where Health Tracking Is Heading
The next generation of healthtech is likely to bring several data streams together rather than keeping them separate.
Imagine combining glucose, sleep, heart rate, body temperature, activity, weight and nutrition in one timeline. Towards Healthcare has already highlighted this direction in India, including a 2026 platform that combines CGM, activity, body composition, wearable data and food logs to track GLP-1 therapy outcomes.
That is where wearable technology becomes more than a fitness accessory.
For healthcare companies and researchers, the real value lies in turning repeated measurements into a clear picture of how the person’s health is changing over time.
The future is therefore not simply about collecting more biomarkers. It is about making those biomarkers meaningful, connected and useful enough to support better decisions.
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